AN501 (REV. 6), AIR FORCE - NAVY AERONAUTICAL STANDARD: SCREW, MACHINE, FILLISTER HEAD, FINE THREAD (12 NOV 1980) [S/S BY NASM501]
AN501 (REV. 6), AIR FORCE - NAVY AERONAUTICAL STANDARD: SCREW, MACHINE, FILLISTER HEAD, FINE THREAD (12 NOV 1980) [S/S BY NASM501].